WARNING: line length of 93 exceeds 80 columns
#58: FILE: include/asm-generic/rqspinlock.h:18:
+extern int resilient_queued_spin_lock_slowpath(struct qspinlock *lock, u32 val, u64 timeout);

CHECK: extern prototypes should be avoided in .h files
#58: FILE: include/asm-generic/rqspinlock.h:18:
+extern int resilient_queued_spin_lock_slowpath(struct qspinlock *lock, u32 val, u64 timeout);

WARNING: line length of 82 exceeds 80 columns
#99: FILE: include/asm-generic/rqspinlock.h:58:
+ * complicated and we don't have a compelling use case for out of order unlocking.

WARNING: memory barrier without comment
#109: FILE: include/asm-generic/rqspinlock.h:68:
+	smp_store_release(&rqh->locks[rqh->cnt - 1], NULL);

WARNING: line length of 82 exceeds 80 columns
#112: FILE: include/asm-generic/rqspinlock.h:71:
+	 * other CPUs, otherwise we have the issue of a stale non-NULL entry being

WARNING: line length of 83 exceeds 80 columns
#113: FILE: include/asm-generic/rqspinlock.h:72:
+	 * visible in the array, leading to misdetection during deadlock detection.

WARNING: line length of 93 exceeds 80 columns
#145: FILE: kernel/locking/rqspinlock.c:86:
+static bool is_lock_released(struct qspinlock *lock, u32 mask, struct rqspinlock_timeout *ts)

WARNING: line length of 81 exceeds 80 columns
#181: FILE: kernel/locking/rqspinlock.c:122:
+	 * O(NR_CPUS) if we could determine the owning CPU from a lock value, but

WARNING: line length of 91 exceeds 80 columns
#185: FILE: kernel/locking/rqspinlock.c:126:
+		struct rqspinlock_held *rqh_cpu = per_cpu_ptr(&rqspinlock_held_locks, cpu);

WARNING: line length of 86 exceeds 80 columns
#190: FILE: kernel/locking/rqspinlock.c:131:
+		 * Let's ensure to break out of this loop if the lock is available for

WARNING: line length of 87 exceeds 80 columns
#197: FILE: kernel/locking/rqspinlock.c:138:
+		 * Skip ourselves, and CPUs whose count is less than 2, as they need at

WARNING: line length of 84 exceeds 80 columns
#198: FILE: kernel/locking/rqspinlock.c:139:
+		 * least one held lock and one acquisition attempt (reflected as top

WARNING: line length of 83 exceeds 80 columns
#201: FILE: kernel/locking/rqspinlock.c:142:
+		 * If cnt is more than RES_NR_HELD, it means the current lock being

WARNING: line length of 87 exceeds 80 columns
#202: FILE: kernel/locking/rqspinlock.c:143:
+		 * acquired won't appear in the table, and other locks in the table are

WARNING: line length of 88 exceeds 80 columns
#205: FILE: kernel/locking/rqspinlock.c:146:
+		if (cpu == smp_processor_id() || real_cnt < 2 || real_cnt > RES_NR_HELD)

WARNING: line length of 84 exceeds 80 columns
#221: FILE: kernel/locking/rqspinlock.c:162:
+		 * Find if the lock we're attempting to acquire is held by this CPU.

WARNING: line length of 84 exceeds 80 columns
#222: FILE: kernel/locking/rqspinlock.c:163:
+		 * Don't consider the topmost entry, as that must be the latest lock

WARNING: line length of 84 exceeds 80 columns
#223: FILE: kernel/locking/rqspinlock.c:164:
+		 * being held or acquired.  For a deadlock, the target CPU must also

WARNING: line length of 87 exceeds 80 columns
#224: FILE: kernel/locking/rqspinlock.c:165:
+		 * attempt to acquire a lock we hold, so for this search only 'cnt - 1'

WARNING: line length of 85 exceeds 80 columns
#308: FILE: kernel/locking/rqspinlock.c:243:
+#define RES_INIT_TIMEOUT(ts, _timeout) ({ (ts).spin = 0; (ts).duration = _timeout; })

WARNING: line length of 105 exceeds 80 columns
#329: FILE: kernel/locking/rqspinlock.c:349:
+		smp_cond_load_acquire(&lock->locked, !VAL || RES_CHECK_TIMEOUT(ts, ret, _Q_LOCKED_MASK));

WARNING: line length of 91 exceeds 80 columns
#371: FILE: kernel/locking/rqspinlock.c:499:
+				       RES_CHECK_TIMEOUT(ts, ret, _Q_LOCKED_PENDING_MASK));

total: 0 errors, 21 warnings, 1 checks, 330 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit db3dc8e7c61a ("rqspinlock: Add deadlock detection and recovery") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 21 warnings, 1 checks, 330 lines checked